op 	 {
  name: "ImmutableConst"
  output_arg {
    name: "tensor"
    type_attr: "dtype"
  }
  attr {
    name: "dtype"
    type: "type"
  }
  attr {
    name: "shape"
    type: "shape"
  }
  attr {
    name: "memory_region_name"
    type: "string"
  }
}
